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Question

Nitrogen oxides produced from the emission of automobiles and power plants, are the source of fine air borne particles, which lead to

A
Photochemical smog
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B
Dry acid deposition
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C
Industrial smog
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D
Wet acid deposition
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Solution

The correct option is D Photochemical smog
The chemicals in photochemical smog include nitrogen oxides, volatile organic compounds (VOCs), ozone, and PAN (peroxyacetyl nitrate). Nitrogen oxides mostly come from the engines of cars and trucks. VOCs are given off by paint, gasoline, and pesticides. Ozone is a form of oxygen that is harmful. PAN is a type of pollution that is made by chemical reactions between other kinds of pollution.
Photochemical smog is a condition that develops when oxides of nitrogen and volatile organic compounds reacts in the presence of sunlight to produce a mixture of hazardous chemicals known as secondary pollutants (photochemical smog).

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